Rotary motor, pump, and the like



Sepft. M, 1923. 11 467.83?

- F. c. T. COLEBROOK ROTARY MOTOR, PUMP, AND THE LIKE Filed June 25, 1921 3 Sheets-Sheet 1 l JZ/ 93 f 55 a a y 6/ s I I! A J :12 a a 32 3 F I g 5; W 54 /g J z W V A z J mum/won I C. 2 601657002 fir fi k-c. W

HTTOEIVEVS Sept. 1111, 11923. 11 46-577837 F. c. T. COLEBROOK ROTARY MOT-OR, PUMP, AND THE LIKE Filed June 23, 1921 3 Sheets- Sheet 2 f C 17. CoZebrook 5epi. M, 1923.

F. c. 1r. COLIEBROOK ROTARY MOTOR, PUMP, AND THE LIKE Filed June 25, 1921 3 sheets Sheet 3 lNl/EN TOR V I (Z Z [biebmok Patented Sept. ii, teas;

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ROTARY MOTOR, PUMP, AND THE LIKE.

Application filed June 23, 1921. Serial No. 479,875.

To all-whom it my comm:

Be it known that Fnaonnron Cnannns THoMAs CoLnBRooK, of 70 Packington Street, Islington, London, N. 1, England v (whose post-oflice address is 70 Packington Street, Islington, London, N. 1, England), has invented-certain new and useful Improvementsin Rotary Motors, Pumps, and the like, of which the following is a specification.-

This invention relates to rotary motors, pumps and the like which are primarily intended for fiuid'power transmission, but are also applicable for other purposes, and has for its object to effect certain improvements in rotary motorsor pumps of the crescentshaped chamber type wherein the vanes or istons are mounted to slide in radial guides in a drum eccentrically mounted in a cylindrical casing, said improvements being intended to provide amotor or pump of this character that shall be both variable in capacity and readily reversible.

According to this invention the cylinder $5 or barrel surrounding the drum carrying. the vanes or pistons and other adjuncts of the rotor and heretofore formin the casin of the pump, ismounted to sli e in a fixe outercasing and provided with means whereby it can be displaced transversely to the axis of the drum from a position of maximum eccentricity to a concentric position, thereby varying the capacity from a maximum to zero or by a still further dis- 'placement in the same direction so altering the position of the working. chamber with respect to the intake and delivery or exhaust, that the flow of the fluid is reversed. Suitable intake and discharge passages are 66 'formed. on diametrically opposite sides of the barrel which in all positions of the barrel are in communication with intake and discharge connections onthe outer casing. The fined outer casing closed at its ends by 4 "removable end covers, which also close the endslof thebarrel and are formed with concentric bearings forthe drum shaft, ball bearingpressure balanced thrust rings or collars being also provided between the ends fth'e' drum and the casing covers.

The invention is hereinafter described with reference to the accompanying two sheets of illustrative drawings, in which similar letters of reference are employed to designate similar parts in the different views.

Fig. 1 is a sectional elevation of a pump constructed according to this invention.

Fig. 2 is a sectional elevation taken at right angles to Fig. 1.

.Fig. 3 is an end elevation with the end cover and ball bearings removed.

Figs. 4 and 5 are isometric detail views of vanes or pistons illustrating means for partly pressure balancing the same.

Fi 6 is an end view of the vane illus- 66 trate in Fig. 4, and

Fig. 7 is a perspective view of a sleevev which is interposed between the vanes or pistons and the casing.

Referring to the drawings the outer casi0 ing a enclosing the displaceable barrel 6 is cast with suitable feet a by means of which the casing can be bolted to its baseplate, and with diametrically opposed bosses a a", bored to form horizontal intake and disit charge connections. Apertured end flanges don the casing serve for the attachment by means of bolts 0' of removable end covers d, formed with bearing bosses d, for the shaft e which terminate at their outer ends in stuffing boxes not shown.

Inside the. casing athe part surrounding the intake and discharge openings therein is faced to'form vertical plane surfaces 7 against which smooth faced flanges b, b, so formed on the intake and discharge passages 5 b", in the barrel 1) are adapted to slide, a suitable packing being interposed if desired. The barrel b is suspended in the casing by a screw-threaded spindle 9 so screwed or otherwise secured in a boss 6 in the top of the barrel and extending vertically through a screw threaded sleeve g mounted to rotate in a sleeve 9 screwed into a boss g in the top of the casing, the sleeve @5 g being provided outside the casing withan operating hand wheel or handle g. By

rotatin the sleeve 9, the spindle g and barrel to which it is attached, can be moved vertically and easily-adjusted. A .cup- W9 leather or other packing g is interposed between the spindle g and boss g to prevent the vanes j circular segmental recesses or seatings are formed for the reception of segmental packing members In.

As illustrated in Figs. 4 to 6 the portions of'the vanes or pistons j which fit into the grooves in the drum are provided in their side faces with recesses j and have transverse passages j extending from opposite faces of the vanes and communicating with the recesses as shown in Figs. 4 and 6, or may be provided with grooves j to connect the recesses with a space under the vanes as shown in Fig. 5. The object of the recesses and passages or grooves is to partly pressure-balance the vanes by admitting a portion of the working fluid to the groove which for the time being is on the suction side, and thereby to counteract to someextent, that part of the pressure on the work ing face which tends 'to force the vane against the side of its groove, thus avoiding excessive friction between the vane and the side of its groove opposed to the working pressure. a

The rotary drum k with its vanes or pistons is enclosed within the barrel 6, the vanes bearing with their inner edges against the floating rings or sleeves of as aforesaid and with their outer packed faces against a sleeve Z interposed between'the vanes and barrel and adapted to take the outward thrust of the vanes, said sleeve being formed with capacious apertures or slots Z between its ends to allow of, the free passage of'the workin fluid to and from the pockets between t e pistons. Sleeve Zwhich is clearly shown in Fig. 7, is connected with the drum h by loose radial arms m inserted in slots n, 0, formed in the ends of the drum h and sleeve Z respectively, the arms forming a positive driving connection between the drum and sleeve and being supported between the floating sleeves d on the drum shaft and ball bearings p Fig. 2 arranged in recesses in the barrel. Between the ends of the drum and the casing covers pairs of thrust rings 9, q are interposed with balls between them, the balls of each bearing be ing arranged to roll on one of the rings when adjustment of the barrel is taking lace. The inner ring 9 of each pair which lies against the ends of the drum is pressure balanced by admitting a portion of the working fluid to its outer face through a passage 1' leading from the interior through an opening in the wall of the barrel fitted with a non-return ball valve 8, the passage 1' terminating in the recess in which the ball bearing p is located, from whence the pressure fluid passes between the bearing rings and through a leak passage into the space between the thrust rings g, g. In view of the reversibility of the apparatus two such valve controlled openings 8 are 'rovided one in communication with the high and the other with the low pressure side.

In operation the drum h with its vanes or pistons j and the sleeve 1 rotate together in the barrel 1) and by actuating the spindle g the barrel 6, together with the sleeve Z can be displaced in the casing a relatively to the drum to reverse the motor or pump, or vary the capacity from the maximum to zero by varying the eccentricity of the chamber as described.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be per formed I declare that what I claim 'is:

1. A device of the character described comprising a fixed outer casing having inlet and outletpassages, an inner cylinder vertically slidably mounted in the outer casing and having inlet and outlet passages registering with the passages of the outer casing, a rotary shaft extending through said casing and said cylinder, a rotor carried by said shaft within said cylinder, said cylinder being capable of being eccentrically disposed with relation to the rotor to form the working chamber, pairs of thrust rings arranged between the ends of the rotor and casing, the inner ring of each pair being pressure balanced by working fluid admitted to its outer face from the inner cylinder, and means for vertically adjusting the inner cylinder to vary the eccentricity of the inner cylinder in relation to the rotor and control rotation of the rdtor.

2. A device of the character described comprisinga fixed outer c linder of cyli'ndrical shape and having in ct and dischar e passages, an inner cylinder mounted to sli e in the fixed outer casing and having inlet and discharge passages registering with the inlet and discharge passages of the fixed outer casing, a shaft journalled concentrically in the outer cylindrical casing and extended through the inner cylinder, a rotor mounted on the shaft and enclosed in the inner cylinder, the inner c linder being C8,". pable of being eccentrical y disposed with relation to the rotor to form the working chamber, pairs of thrust rings arranged between the ends of the rotor and easing, the inner ring of each pair being pressure balmeme? anced to admit a, portion of the working the axis of the rotor to vary the eccentricity fluid to its outer face through a, valve conof the inner cylinder with relation to the trolled passage in the well of the inne-reylrotor from e maximum to zero or to reverse 10 index", venes or pistons mounted to slide in the apparatus.

5 radial guides in the rotor and means capable In testimony whereof he has efiixed his of being operated from outside the casing to signature. displace the inner cylinder transversely of FEEDEMQEK CHARLES THOPHA CULEBRUOK. 

